2007 Jeep Grand Cherokee Owner's Manual - Page 303

STARTING AND OPERATING 303 If the ignition key is cycled, this sequence will repeat, providing the system fault still exists. If the system fault no longer exists, the "Tire Pressure Monitoring Telltale Light" will no longer flash, the SERVICE TIRE PRESS. SYSTEM text message will no longer display, and a pressure value will be displayed instead of dashes. NOTE: If your vehicle is equipped with a matching full size spare tire, it has a tire pressure monitoring sensor, and can be monitored by the Tire Pressure Monitoring System (TPMS). In the event that the matching full size spare tire is swapped with a low pressure road tire, the next ignition key cycle will still show the "Tire Pressure Monitoring Telltale Light" to be ON, a chime to sound, a Low Pressure message to appear in the EVIC, and the graphic display will still show the low tire pressure value flashing. Driving the vehicle for up to 10 minutes above 15 mph (24 km/h) will turn OFF the "Tire Pressure Monitoring Telltale Light" as long as the matching full size spare tire or any other road tire(s) are not below the low pressure warning threshold. The EVIC will display a "Spare Low Pressure" text message, and the graphic display will show a new tire pressure value in place of the flashing low tire pressure value. NOTE: If your vehicle is equipped with a non-matching full size spare tire, it does not have a tire pressure monitoring sensor. Therefore, it will not be monitored by the Tire Pressure Monitor System (TPMS). In the event that the non-matching full size spare tire is swapped with a low pressure road tire, every ignition key cycle will still show the "Tire Pressure Monitoring Telltale Light" to be ON, a chime to sound, a Low Pressure message to appear in the EVIC, and the graphic display will still show the low tire pressure value flashing. After the original road tire has been properly repaired and put back onto the vehicle in place of the non-matching full size spare tire, the TPMS will update the graphic display on the EVIC with a new tire pressure value instead of the flashing low tire pressure value, and the "Tire Pressure Monitoring 5